Vertical axial mixed-flow pump with novel structure

Abstract

The utility model relates to a vertical shaft mixed-flow pump with a novel structure. The vertical shaft mixed-flow pump comprises a stuffing box, a bearing body component, a pump shaft, a pump body, an impeller and a motor, the pump shaft is directly connected with the motor and the impeller, the bearing body component is located on the upper portion of the stuffing box, and the bearing body component is directly and rigidly connected with the pump body through a flange structure. The bearing body part comprises at least two groups of angular contact ball bearings which are arranged back to back; the motor is installed at the upper end of the bearing body component. The bearing body part is integrated on the upper portion of the stuffing box of the water pump layer, a traditional motor base structure is omitted, and the motor and the impeller are directly connected through the pump shaft. According to the design, the manufacturing cost is remarkably reduced, the axial installation size is shortened, meanwhile, the vibration of equipment is reduced by optimizing an axial force transmission path, and the device is particularly suitable for pump station transformation projects with limited space.

Description

Technical Field

[0001] This utility model relates to a mixed-flow pump, specifically a new type of vertical shaft mixed-flow pump that reduces manufacturing costs, shortens axial installation dimensions, and reduces equipment vibration by optimizing the axial force transmission path. Background Technology

[0002] Traditional vertical axial mixed-flow pumps employ a layered structural design, where the bearing housing, which bears the axial force, is located inside the motor mount within the motor layer, connected to the pump shaft via a drive shaft. This structure has the following drawbacks:

[0003] 1. A separate motor mount support bearing body is required, which increases manufacturing costs and installation complexity;

[0004] 2. Long drive shafts are prone to vibration and alignment errors, reducing operational stability;

[0005] 3. The multi-layered structure makes maintenance difficult, and repairs require disassembling multiple components. Utility Model Content

[0006] To address the aforementioned problems, the main objective of this utility model is to provide a new type of vertical axial mixed-flow pump that reduces manufacturing costs, shortens axial installation dimensions, and reduces equipment vibration by optimizing the axial force transmission path.

[0007] The present invention solves the above-mentioned technical problems through the following technical solution: a new type of vertical shaft mixed flow pump, the new type of vertical shaft mixed flow pump comprising: a stuffing box, a bearing housing component, a pump shaft, a pump body, an impeller, and a motor.

[0008] The pump shaft directly connects the motor and the impeller. The bearing housing component is located on the upper part of the stuffing box. The bearing housing component is directly and rigidly connected to the pump body through a flange structure. The bearing housing component contains at least two sets of angular contact ball bearings arranged back to back. The motor is mounted on the upper end of the bearing housing component.

[0009] In a specific embodiment of this utility model, the mating surfaces of the pump body and the bearing body are provided with an axial positioning stop.

[0010] In a specific embodiment of this utility model, the coaxiality error between the pump body and the bearing body is ≤0.05mm.

[0011] In a specific embodiment of this utility model, the motor is directly mounted on the upper end of the bearing body component via a flange.

[0012] In a specific embodiment of this utility model, the bearing body component adopts a double-row angular contact ball bearing assembly with a preload adjustment range of ±15%.

[0013] The positive and progressive effects of this utility model are as follows: Compared with common technologies, the new vertical axial mixed-flow pump provided by this utility model has the following advantages:

[0014] 1. Simplified structure: The motor base and drive shaft are eliminated, reducing the number of parts by more than 30% and material costs by 25%-40%.

[0015] 2. Improved stability: Removing the drive shaft reduces vibration amplitude by more than 50%, and shortening the axial force transmission path improves alignment accuracy by 2 levels.

[0016] 3. Easy maintenance: The integrated design reduces the time spent on repairing key components by 60% and supports online maintenance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a common similar technology.

[0018] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0019] The following are the names corresponding to the reference numerals in this utility model:

[0020] 1. Stuffing box; 2. Bearing body component; 3. Pump shaft; 5. Pump body; 6. Impeller; 7. Motor. Detailed Implementation

[0021] The preferred embodiments of this utility model are given below with reference to the accompanying drawings to illustrate the technical solution of this utility model in detail.

[0022] Figure 2 This is a schematic diagram of the overall structure of the present invention, as shown below. Figure 1 As shown, this utility model proposes a novel vertical shaft mixed-flow pump, which includes: a stuffing box 1, a bearing housing component 2, a pump shaft 3, a pump body 5, an impeller 6, and a motor 7. In this utility model, a single pump shaft 3 directly connects the motor 7 and the impeller 6. The bearing housing component 2 is located on the upper part of the stuffing box 1 and is directly and rigidly connected to the pump body 5 through a flange structure. The bearing housing component 2 contains at least two sets of angular contact ball bearings arranged back to back, and the motor 7 is mounted on the upper end of the bearing housing component 2.

[0023] During the specific installation process, the mating surfaces of the pump body 5 and the bearing body component 2 in this utility model are provided with axial positioning stops, and the coaxiality error between the pump body 5 and the bearing body component 2 is ≤0.05mm.

[0024] During the installation process, the motor 7 is directly mounted on the upper end of the bearing body component 2 via the flange.

[0025] When bearing housing component 2 uses a double-row angular contact ball bearing assembly, the preload adjustment range is ±15%.

[0026] This invention reduces costs and improves operational stability through structural optimization.

[0027] This invention eliminates the motor base and drive shaft, reducing the number of parts by more than 30% and material costs by 25%-40%.

[0028] The stability of this invention is improved by eliminating the drive shaft, which reduces vibration amplitude by more than 50%, and the shortened axial force transmission path improves the alignment accuracy by two levels.

[0029] This utility model makes maintenance more convenient, and the integrated design reduces the time spent on repairing key components by 60%, supporting online maintenance.

[0030] This invention eliminates the drive shaft 4 and uses only one pump shaft, with the radial runout tolerance controlled within 0.02mm.

[0031] This invention integrates the bearing housing component into the upper part of the pump stuffing box, eliminating the traditional motor mount structure and using a single pump shaft directly connecting the motor and impeller. This design significantly reduces manufacturing costs, shortens the axial installation dimension by more than 40%, and reduces equipment vibration by 50% by optimizing the axial force transmission path, making it particularly suitable for pump station renovation projects with limited space.

[0032] This invention integrates the functions of the bearing body and the stuffing box, enabling the direct bearing of axial force in the pump layer.

[0033] This invention employs a three-stage rigid connection of pump body-bearing body-motor to eliminate the vibration defects of traditional elastic supports.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A vertical shaft mixed flow pump of new structure, characterized in that: The new structure vertical shaft mixed flow pump comprises a stuffing box (1), a bearing body component (2), a pump shaft (3), a pump body (5), an impeller (6) and a motor (7); A pump shaft (3) is directly connected with the motor (7) and the impeller (6), the bearing body component (2) is located at the upper part of the stuffing box (1), the bearing body component (2) is directly and rigidly connected with the pump body (5) through a flange structure, the bearing body component (2) comprises at least two groups of angular contact ball bearings arranged in back-to-back mode, and the motor (7) is installed on the upper end of the bearing body component (2).

2. The new structure vertical shaft mixed flow pump according to claim 1, characterized in that: An axial positioning stop is arranged on the matching surface of the pump body (5) and the bearing body component (2).

3. The new structure vertical shaft mixed flow pump according to claim 2, characterized in that: The coaxiality error of the pump body (5) and the bearing body component (2) is less than or equal to 0.05 mm.

4. The new structure vertical shaft mixed flow pump according to claim 1, characterized in that: The motor (7) is directly installed on the upper end of the bearing body component (2) through a flange.

5. The new structure vertical shaft mixed flow pump according to claim 1, characterized in that: The bearing body component (2) adopts double-row angular contact ball bearing groups, and the pre-tightening force adjustment range is ±15%.

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